# GalleryLoadMetaDataProcess.java

    /*
     * Copyright (C) 2000 - 2024 Silverpeas
     *
     * This program is free software: you can redistribute it and/or modify
     * it under the terms of the GNU Affero General Public License as
     * published by the Free Software Foundation, either version 3 of the
     * License, or (at your option) any later version.
     *
     * As a special exception to the terms and conditions of version 3.0 of
     * the GPL, you may redistribute this Program in connection with Free/Libre
     * Open Source Software ("FLOSS") applications as described in Silverpeas's
     * FLOSS exception. You should have received a copy of the text describing
     * the FLOSS exception, and it is also available here:
     * "http://www.silverpeas.org/docs/core/legal/floss_exception.html"
     *
     * This program is distributed in the hope that it will be useful,
     * but WITHOUT ANY WARRANTY; without even the implied warranty of
     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
     * GNU Affero General Public License for more details.
     *
     * You should have received a copy of the GNU Affero General Public License
     * along with this program. If not, see <https://www.gnu.org/licenses/>.
     */
    package org.silverpeas.components.gallery.process.media;

    import org.silverpeas.components.gallery.constant.MediaMimeType;
    import org.silverpeas.components.gallery.media.DrewMediaMetadataExtractor;
    import org.silverpeas.components.gallery.media.MediaMetadataException;
    import org.silverpeas.components.gallery.media.MediaMetadataExtractor;
    import org.silverpeas.components.gallery.model.InternalMedia;
    import org.silverpeas.components.gallery.model.Media;
    import org.silverpeas.components.gallery.model.Photo;
    import org.silverpeas.core.notification.message.MessageManager;
    import org.silverpeas.core.process.ProcessProvider;
    import org.silverpeas.core.process.io.file.FileHandler;
    import org.silverpeas.core.process.io.file.HandledFile;
    import org.silverpeas.core.process.management.AbstractFileProcess;
    import org.silverpeas.core.process.management.ProcessExecutionContext;
    import org.silverpeas.core.process.session.ProcessSession;
    import org.silverpeas.kernel.logging.SilverLogger;

    import java.io.IOException;
    import java.io.UnsupportedEncodingException;

    /**
     * Process to load metadata of a photo
     * @author Yohann Chastagnier
     */
    public class GalleryLoadMetaDataProcess extends AbstractFileProcess<ProcessExecutionContext> {

      private final InternalMedia media;

      private GalleryLoadMetaDataProcess(final InternalMedia media) {
        this.media = media;
      }

      public static void load(final InternalMedia media) throws Exception {
        ProcessProvider.getProcessManagement().execute(new GalleryLoadMetaDataProcess(media),
            new ProcessExecutionContext(null, null));
      }

      @Override
      public void processFiles(final ProcessExecutionContext context, final ProcessSession session,
          final FileHandler fileHandler) throws MediaMetadataException {
        if (media.getType().isPhoto()) {
          setMetaData(fileHandler, media.getPhoto());
        }
      }

      private void setMetaData(final FileHandler fileHandler, final Photo photo)
          throws MediaMetadataException {
        if (MediaMimeType.JPG == photo.getFileMimeType()) {
          final HandledFile handledFile = fileHandler
              .getHandledFile(Media.BASE_PATH, photo.getInstanceId(), photo.getWorkspaceSubFolderName(),
                  photo.getFileName());
          if (handledFile.exists()) {
            try {
              MediaMetadataExtractor extractor = new DrewMediaMetadataExtractor(photo.getInstanceId());
              String lang = MessageManager.getLanguage();
              extractor.extractImageExifMetaData(handledFile.getFile(), lang)
                  .forEach(photo.getAllMetaData()::addMetaData);
              extractor.extractImageIptcMetaData(handledFile.getFile(), lang)
                  .forEach(photo.getAllMetaData()::addMetaData);
            } catch (UnsupportedEncodingException e) {
              SilverLogger.getLogger(GalleryLoadMetaDataProcess.class).silent(e)
                  .error("Bad metadata encoding in image " + photo.getTitle() + ": " + e.getMessage());
            } catch (IOException e) {
              throw new MediaMetadataException(e);
            }
          }
        }
      }
    }